ci: remove audit ignore of quick-xml advisories - #25600

## Which issue does this PR close?

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- Closes #N/A.

## Rationale for this change

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In commit #094ad31, @alamb fixed CI failure by temporarily ignoring the
two quick-xml RustSec advisories in the
audit workflow and documented that the ignores should be removed once
object_store upgrades to quick-xml >= 0.41.0.

Now that PR apache#25335 has been merged, we can remove these temeporary
ignores.



## What changes are included in this PR?

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Remove the two temporary audit ignores in security_audit.sh. 

## What is the testing strategy for this PR?

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Just CI update

## Are there any user-facing changes?

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No

Signed-off-by: Jiawei Zhao <[email protected]>